Method for preparing magnesium oxide, nickel, cobalt and white carbon black through utilizing serpentine

Abstract

The invention relates to method for preparing magnesium oxide, nickel and cobalt or white carbon black through utilizing serpentine, or for simultaneously preparing magnesium oxide, nickel, cobalt and white carbon black through utilizing serpentine. The method comprises the following steps: roasting a raw material serpentine, milling, leaching by an ammonium salt containing NH4<+> to obtain a magnesium ion solution, preparing a magnesium carbonate hydrate intermediate which has a good crystal form and is easy to filter through an ammonium carbonate cycle process, calcining to produce highly pure magnesium oxide; leaching above filter residues by hydrochloric acid, filtering, adding magnesium oxide to an obtained filtrate to adjust the pH value to obtain precipitated nickel and cobalt; dissolving an obtained filtrate residue through a concentrated alkali, and neutralizing by sulfuric acid to prepare a white carbon black product. The method has the following advantages: magnesium, nickel, cobalt and silicon in the serpentine are comprehensive utilized, and the cycle use of carbon dioxide, ammonia gas and a mother liquor containing NH4<+> is realized; an aqueous solution containing the NH4<+> is adopted as a leaching solvent, so there is no extract Ca, Al and Fe impurity removal operation of an obtained magnesium ion solution; and magnesium oxide is adopted to adjust the pH value, so other impurities are not introduced.

Description

technical field

[0001] The invention relates to a method for preparing magnesium oxide, nickel, cobalt and white carbon black, in particular to a method for preparing magnesium oxide, nickel, cobalt and white carbon black by using serpentine. Background technique

[0002] Serpentine is a general term for a hydrated magnesium-rich silicate mineral. It is a layered silicate mineral composed of silicon-oxygen tetrahedron and magnesium hydroxide octahedron. The theoretical chemical formula is 3MgO 2SiO 2 2H 2 O, the main available elements are silicon and magnesium, and some minerals also contain metal elements such as nickel and cobalt. In subspecies such as aluminum serpentine, nickel serpentine, and iron serpentine, a large part of the six-coordinated Mg in the ore is replaced by Al 3+ 、Ni 2+ , Fe 2+ , Fe 3+ Wait for replacement. my country is rich in serpentine resources with good texture, and most of the ores contain valuable metal resources such as Ni and Co. [000...

Examples

Embodiment 1

[0065] (1) Calcinate a serpentine ore in a muffle furnace for 240 minutes at a temperature of 650°C, and then grind it to obtain powdery particles with a particle size of 90-150 mesh. The chemical composition of the serpentine ore after calcination was analyzed and determined by chemical analysis (see Table 1).

[0066] (2) Configure 1000ml of 2mol / L ammonium chloride aqueous solution, put it in the reactor, control the temperature of the reactor at 105°C, weigh 80 grams of the powdery particles obtained in step (1) into the reactor, stir for 2 After an hour, cool down to room temperature naturally.

[0067] (3) filtering the magma obtained in step (2), separating and removing insoluble matter, the content of magnesium in the obtained magnesium chloride solution is 0.61mol / L;

[0068] (4) Place 500 mL of the magnesium chloride solution obtained in step (3) in a reaction vessel, control the temperature of the reaction vessel to 80°C, and pass through the solution with ammonia ...

Embodiment 2

[0076] (1) Calcinate a serpentine ore in a muffle furnace for 240 minutes at a temperature of 450°C, and then grind it to obtain powdery particles with a particle size of 45-65 mesh. The chemical composition of the serpentine ore after calcination was analyzed and determined by chemical analysis (see Table 2).

[0077] (2) Configure 1000ml of 2mol / L ammonium chloride aqueous solution, put it in the reactor, control the temperature of the reactor at 110°C, weigh 80 grams of the powdery particles obtained in step (1) into the reactor, stir for 2 After an hour, cool down to room temperature naturally.

[0078] (3) filtering the magma obtained in step (2), separating and removing insoluble matter, the content of magnesium in the obtained magnesium chloride solution is 0.60mol / L;

[0079] (4) Place 500 mL of the magnesium chloride solution obtained in step (3) into a reaction vessel, control the temperature of the reaction vessel to 85°C, and pass through the solution with ammonia...

Embodiment 3

[0087] (1) Calcinate a serpentine ore in a muffle furnace for 240 minutes at a temperature of 850°C, and then grind it to obtain powdery particles with a particle size of 65-90 mesh. The chemical composition of the serpentine ore after calcination was analyzed and determined by chemical analysis (see Table 3).

[0088] (2) Configure 1000ml of 2mol / L ammonium chloride aqueous solution, put it in the reactor, control the temperature of the reactor at 130°C, weigh 80 grams of the MgO powder obtained in step (1) into the reactor, stir for 2 After an hour, cool down to room temperature naturally.

[0089] (3) filtering the magma obtained in step (2), separating and removing insoluble matter, the content of magnesium in the obtained magnesium chloride solution is 0.63mol / L;

[0090] (4) Place 500 mL of the magnesium chloride solution obtained in step (3) in a reaction vessel, control the temperature of the reaction vessel to 80°C, and pass through the solution with ammonia and carb...

technical field

[0001] The invention relates to a method for preparing magnesium oxide, nickel, cobalt and white carbon black, in particular to a method for preparing magnesium oxide, nickel, cobalt and white carbon black by using serpentine. Background technique

[0002] Serpentine is a general term for a hydrated magnesium-rich silicate mineral. It is a layered silicate mineral composed of silicon-oxygen tetrahedron and magnesium hydroxide octahedron. The theoretical chemical formula is 3MgO 2SiO 2 2H 2 O, the main available elements are silicon and magnesium, and some minerals also contain metal elements such as nickel and cobalt. In subspecies such as aluminum serpentine, nickel serpentine, and iron serpentine, a large part of the six-coordinated Mg in the ore is replaced by Al 3+ 、Ni 2+ , Fe 2+ , Fe 3+ Wait for replacement. my country is rich in serpentine resources with good texture, and most of the ores contain valuable metal resources such as Ni and Co. [000...

Examples

Embodiment 1

[0065] (1) Calcinate a serpentine ore in a muffle furnace for 240 minutes at a temperature of 650°C, and then grind it to obtain powdery particles with a particle size of 90-150 mesh. The chemical composition of the serpentine ore after calcination was analyzed and determined by chemical analysis (see Table 1).

[0066] (2) Configure 1000ml of 2mol / L ammonium chloride aqueous solution, put it in the reactor, control the temperature of the reactor at 105°C, weigh 80 grams of the powdery particles obtained in step (1) into the reactor, stir for 2 After an hour, cool down to room temperature naturally.

[0067] (3) filtering the magma obtained in step (2), separating and removing insoluble matter, the content of magnesium in the obtained magnesium chloride solution is 0.61mol / L;

[0068] (4) Place 500 mL of the magnesium chloride solution obtained in step (3) in a reaction vessel, control the temperature of the reaction vessel to 80°C, and pass through the solution with ammonia ...

Embodiment 2

[0076] (1) Calcinate a serpentine ore in a muffle furnace for 240 minutes at a temperature of 450°C, and then grind it to obtain powdery particles with a particle size of 45-65 mesh. The chemical composition of the serpentine ore after calcination was analyzed and determined by chemical analysis (see Table 2).

[0077] (2) Configure 1000ml of 2mol / L ammonium chloride aqueous solution, put it in the reactor, control the temperature of the reactor at 110°C, weigh 80 grams of the powdery particles obtained in step (1) into the reactor, stir for 2 After an hour, cool down to room temperature naturally.

[0078] (3) filtering the magma obtained in step (2), separating and removing insoluble matter, the content of magnesium in the obtained magnesium chloride solution is 0.60mol / L;

[0079] (4) Place 500 mL of the magnesium chloride solution obtained in step (3) into a reaction vessel, control the temperature of the reaction vessel to 85°C, and pass through the solution with ammonia...

Embodiment 3

[0087] (1) Calcinate a serpentine ore in a muffle furnace for 240 minutes at a temperature of 850°C, and then grind it to obtain powdery particles with a particle size of 65-90 mesh. The chemical composition of the serpentine ore after calcination was analyzed and determined by chemical analysis (see Table 3).

[0088] (2) Configure 1000ml of 2mol / L ammonium chloride aqueous solution, put it in the reactor, control the temperature of the reactor at 130°C, weigh 80 grams of the MgO powder obtained in step (1) into the reactor, stir for 2 After an hour, cool down to room temperature naturally.

[0089] (3) filtering the magma obtained in step (2), separating and removing insoluble matter, the content of magnesium in the obtained magnesium chloride solution is 0.63mol / L;

[0090] (4) Place 500 mL of the magnesium chloride solution obtained in step (3) in a reaction vessel, control the temperature of the reaction vessel to 80°C, and pass through the solution with ammonia and carb...

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